Electric fan



FIG. 1 is a front elevation view of an electric fan showing my new design;

FIG. 2 is a right side elevation view thereof, the left side being a mirror image of that shown;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view. 

The ornamental design for an electric fan, as shown. 